What causes skin cancer? Very simply, sunburn and UV light can damage your skin, and this damage can lead to skin cancer. There are also other determining factors, including heredity and environmental factors. The total amount of sun received over the years and overexposure resulting in sunburn can cause skin cancer. Skin cancer is very slow to develop. The sunburn you receive this week may take 20 years or more to become skin cancer.
Moles are usually harmless collections of pigmented cells on your skin. Moles can appear alone or in multiples. Moles are commonly found on your face, arms and legs. Moles can be present in more obscure locations as well, including on your scalp, under your nails, in your armpits and around your genitals. Most people have multiple moles and the number constantly changes. Most moles appear by young adulthood but might appear up through your mid-adult years. Some moles disappear with advancing age. Moles can become cancerous, so you should keep track of where they appear on your skin and monitor them for changes in appearance and texture, including changes in pigmentation.